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Photo of Professor Niels Kjaergaard.

Lab 319b
Room 316
Phone numbers
7786 (Office)
64 3 479 7786 (Office Direct Dial)
7786 (Lab)
Research Group

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Niels Kjærgaard received his PhD in 2001 from Aarhus University, Denmark.

We are presently developing a novel collider to perform high precision atomic physics measurements. This research is supported for three years by the Marsden Fund, selected in the 2011 round as one of 5 projects funded across Physics, Chemistry, and Biochemistry in New Zealand. As the high-energy colliders used in particle physics like the LHC at CERN, our apparatus will smash together bunches of atoms and analyze the spatial distribution of the scattered debris. However, our collider will operate in a regime of extreme contrast: it will use samples of atoms at nano-Kelvin temperatures accelerated to pedestrian velocities of up to a meter per second. The full execution of this collider utilizes a collaboration with theorists who have developed state-of-the-art calculations to extract key information from the experimental scattering patterns.

Find out more about my research.


Deb, A. B., & Kjærgaard, N. (2021). Observation of Pauli blocking in light scattering from quantum degenerate fermions. Science, 374(6570), 972-975. doi: 10.1126/science.abh3470

Chilcott, M., Thomas, R., & Kjærgaard, N. (2021). Experimental observation of the avoided crossing of two S-matrix resonance poles in an ultracold atom collider. Physical Review Research, 3(3), 033209. doi: 10.1103/PhysRevResearch.3.033209

Otto, J. S., Hunter, M. K., Kjærgaard, N., & Deb, A. B. (2021). Data capacity scaling of a distributed Rydberg atomic receiver array. Journal of Applied Physics, 129(15), 154503. doi: 10.1063/5.0048415

Thomas, R., Otto, J. S., Chilcott, M., Deb, A. B., & Kjærgaard, N. (2021). Reducing number fluctuations in an ultracold atomic sample using Faraday rotation and iterative feedback. Physical Review A, 16, 064033. doi: 10.1103/PhysRevApplied.16.064033

Chilcott, M., & Kjærgaard, N. (2021). Low-cost wireless condition monitoring system for an ultracold atom machine [Tutorial]. Internet of Things, 13, 100345. doi: 10.1016/j.iot.2020.100345

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